Gold/Copper-Based Metal-Organic Framework/Glassy Carbon Electrode as High Efficient Electrochemical Sensor for Determination of Hydrogen Peroxide

Abstract

In this study, the modified gold/copper-based metal-organic framework on glassy carbon electrodes [(Aux:Cuy)-MOFs/GCE (x, y = 0, 1, 2 and 3 as volume ratio)] were applied for electrochemical determination of hydrogen peroxide (H2O2). (Aux:Cuy)-MOFs were synthesized through the oriented growth method and were applied to modification of GCE. SEM and XRD analyses were employed to structural studies of synthesized (Aux:Cuy)-MOFs. Cyclic voltammetry and amperometry techniques were used to electrochemical characterization of (Aux:Cuy)-MOFs/GCE as H2O2 sensor. Results showed that (Aux:Cuy)-MOFs were synthesized in porous and densely packed irregular nano-sheet structure. The electrochemical studies showed that (Au1:Cu2)-MOF/GCE was fast response, sensitive, stable and selective sensor for the determination of H2O2. The wide linear range, sensitivity and detection limit of the sensor were estimated of 1 to 19 μM, 2.022 μA/ μM and 0.014 μM, respectively. Comparison performance (Au1:Cu2)-MOF/GCE with other H2O2 sensor exhibits higher or comparative sensitivity in determination of H2O2. Study the sensor response to the determination of H2O2 in real sample indicated satisfactory RSD and recovery values was less than 4.51% and more than 91.86%, respectively.